SuzukiSavage.com - Carb Confusion

ralfyguy Serious Thumper Offline Posts: 932	Re: Carb Confusion Reply #15 - 07/29/10 at 18:48:24 I added some stuff to my previous post.
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DrunkenDwarf

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Re: Carb Confusion
Reply #16 - 07/29/10 at 21:15:45

ralfyguy wrote on 07/29/10 at 18:40:35:

Where did you get the 52.5 pilot WITH bleed holes from? Does that mean it may run a bit richer than the same size without holes? I wish I had one to try, as the 55 jet I have is too much.

Lancer, I think.

Does anyone have any suggestions on what I can use to temporarily block the vacuum port on the carb? I've got plenty of golf tees to use on the vacuum hose.

-D. Dwarf

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Pearl White 2007 S40; Dyna exhaust; Current jets: 52.5 w/ bleed (2 turns out) / 1.5mm (0.06") spacer / 150; raptor petcock

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Serowbot YaBB Moderator ModSquad Offline OK.... so what's the speed of dark? Posts: 28651 Tucson Az Gender:	Re: Carb Confusion Reply #17 - 07/29/10 at 22:25:40 if you have another bit of hose,... use that and stick a golf tee in there too...
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LANCER Serious Thumper Alliance Member Offline Savage Beast Performance Parts Posts: 10661 Oklahoma Gender:	Re: Carb Confusion Reply #18 - 07/30/10 at 02:12:55 I get the little rubber caps at the auto parts store
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DrunkenDwarf Senior Member Offline Morning Zombie Posts: 325 Seattle, WA Gender:	Re: Carb Confusion Reply #19 - 07/30/10 at 05:54:48 Serowbot wrote on 07/29/10 at 22:25:40: if you have another bit of hose,... use that and stick a golf tee in there too... I don't. LANCER wrote on 07/30/10 at 02:12:55: I get the little rubber caps at the auto parts store What's the ID of the hose/cap I should be looking for? -D. Dwarf
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Bubba Serious Thumper Offline SuzukiSavage.com Rocks! Posts: 956 Denver, CO Gender:	Re: Carb Confusion Reply #20 - 07/30/10 at 07:21:25 Put a screw in mine then capped it with a rubber tip thing from a dish rack
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DrunkenDwarf Senior Member Offline Morning Zombie Posts: 325 Seattle, WA Gender:	Re: Carb Confusion Reply #21 - 07/30/10 at 07:34:41 According to this: http://suzukisavage.com/cgi-bin/YaBB.pl?num=1117481092/1#1 It's 3/16". I'm surprised it's not 5mm. (or maybe it is) -D. Dwarf
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DrunkenDwarf

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Re: Carb Confusion
Reply #22 - 08/01/10 at 13:05:37

ralfyguy wrote on 07/29/10 at 08:34:58:

Drunken Dwarf can you try something for me?
With the engine warmed up and idling, squeeze the vacuum hose off with your fingers on the u-bend and tell me if the idle seems to rise a bit, and when you let go seems to go back down.

I performed this test again with the petcock in the ON and RES position and got the same results.
I then setup the petcock up as describe in the thread Test your Petcock.
The engine idled at faster rate then usual. Very similar to having the vacuum line pinched.
With the test setup I bottomed out the idle mixture screw without the engine stalling.

So this points to either a leaky vacuum hose or petcock diaphragm. Does anyone have a suggestion (or bet) on which one it is?

After the engine cools I'll install a new vacuum hose (got some 3/16 inside, 3/8 outside diameter fuel hose from Lowe's) and try again.

-D. Dwarf

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Pearl White 2007 S40; Dyna exhaust; Current jets: 52.5 w/ bleed (2 turns out) / 1.5mm (0.06") spacer / 150; raptor petcock

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Serowbot YaBB Moderator ModSquad Offline OK.... so what's the speed of dark? Posts: 28651 Tucson Az Gender:	Re: Carb Confusion Reply #23 - 08/01/10 at 13:30:02 Give a suck on the vacuum line,... if you get gas,(don't swallow)... the diaphragm is leaky and you need a new petcock,... if you don't get any gas, you need a new hose...
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DrunkenDwarf Senior Member Offline Morning Zombie Posts: 325 Seattle, WA Gender:	Re: Carb Confusion Reply #24 - 08/03/10 at 18:26:47 Serowbot wrote on 08/01/10 at 13:30:02: Give a suck on the vacuum line,... if you get gas,(don't swallow)... the diaphragm is leaky and you need a new petcock,... if you don't get any gas, you need a new hose... I didn't get a mouthful of gas (no liquid), but I did get the taste of gas. -D. Dwarf
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ralfyguy

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Re: Carb Confusion
Reply #25 - 08/03/10 at 19:53:08

The hose is connected to the carb and there's gasoline not far away from the nipple. I did that on mine and I got the same sensation. There's a vacuum created and when the engine stops, the vaccum breaks and a tad of gasoline vapor is sucked backwards into the hose to equalize the atmospheric pressure. I would consider that normal. I even make a bet that everyone on here with the stock setup that would try that is gonna get the same sensation.

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DrunkenDwarf

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Re: Carb Confusion
Reply #26 - 08/03/10 at 20:16:21

ralfyguy wrote on 08/03/10 at 19:53:08:

The hose is connected to the carb and there's gasoline not far away from the nipple. I did that on mine and I got the same sensation. There's a vacuum created and when the engine stops, the vaccum breaks and a tad of gasoline vapor is sucked backwards into the hose to equalize the atmospheric pressure. I would consider that normal. I even make a bet that everyone on here with the stock setup that would try that is gonna get the same sensation.

Cool.

I'll replace the vacuum hose and see how it goes.

I tried to do it earlier, but I couldn't get the new hose on the petcock while the tank was still on.

A couple questions about the vacuum hose.
My replacement is thicker than the old one and the spring won't fit on it - any issue with it being against the cooling fins?
Also, due to the thickness of the replacement I may not be able to route it above the carb. Does the length matter?

-D. Dwarf

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Pearl White 2007 S40; Dyna exhaust; Current jets: 52.5 w/ bleed (2 turns out) / 1.5mm (0.06") spacer / 150; raptor petcock

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ralfyguy Serious Thumper Offline Posts: 932	Re: Carb Confusion Reply #27 - 08/04/10 at 04:32:50 Did you get 3/16" ID? Sounds like it's bigger. It shouldn't touch the cooling fins. It's gonna melt. I got 3/16" fuel hose at O'Reilly's for about a Dollar for 3 foot.
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Routy Serious Thumper Offline SuzukiSavage.com Rocks! Posts: 2280 Winston Oregon Gender:	Re: Carb Confusion Reply #28 - 08/04/10 at 05:23:36 There can be an outside diameter difference between fuel hose and vacuum hose. Why not use vacuum hose !
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DrunkenDwarf

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Re: Carb Confusion
Reply #29 - 08/04/10 at 06:24:05

ralfyguy wrote on 08/04/10 at 04:32:50:

Did you get 3/16" ID? Sounds like it's bigger. It shouldn't touch the cooling fins. It's gonna melt. I got 3/16" fuel hose at O'Reilly's for about a Dollar for 3 foot.

Routy wrote on 08/04/10 at 05:23:36:

There can be an outside diameter difference between fuel hose and vacuum hose. Why not use vacuum hose !

I got 3/16" ID and 3/8" OD fuel hose from Lowe's. It was the only thing they had in 3/16" ID that wasn't vinyl or poly.

I didn't see anything at AutoZone, I'll try Advanced Auto.

-D. Dwarf

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Pearl White 2007 S40; Dyna exhaust; Current jets: 52.5 w/ bleed (2 turns out) / 1.5mm (0.06") spacer / 150; raptor petcock

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